Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d6ddb8a030b6b7…

MALICIOUS

PDF

98.6 KB Created: 2020-08-15 06:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a775cbe03089f832bc0392908c0a79c0 SHA-1: 10569eb4d2965619da711716fa2d0fb639a9971f SHA-256: 15d6ddb8a030b6b780ed5523216f8f04fb748838553752b8c1683562b0e1a1a7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO abuse tactic. The ML classifier also strongly indicated maliciousness. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=vaijanti+mala+photo', is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=vaijanti+mala+photo
    • http://files.oakmountainfirewood.com/uploads/1/3/1/3/131383651/xarabumab_jipike_kuduxokapeba.pdf
    • http://files.gcaseven.com/uploads/1/3/1/3/131381658/7506988.pdf
    • http://files.melissacoaching.com/uploads/1/3/0/7/130775537/mimoge-ruwupedipiviv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/10258671201.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/ballistic_trauma_a_practical_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5777/3718/files/paras_civil_code_obligations_and_contracts.pdf
    • https://cdn.shopify.com/s/files/1/0437/7110/1338/files/74210425248.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/welojufosinokiwemeta.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1819/files/78515194305.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/95655904093.pdf
    • https://cdn.shopify.com/s/files/1/0429/2342/5955/files/gakugowumebavu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9136/files/guvilanilolimik.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5961/files/wikeli.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013361.bin
9d0d7cc69ce1a977f63c5d902b34a381d84b0ada5060ebb7fc4e6d25cbfa9a40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13361 4828 bytes
font_01_sfnt_off000143a3.bin
0710f4a16e0fe38a89326f95b180f76cd0940d2437d6805a9d2b25f4039937d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143A3 10652 bytes
font_02_sfnt_off00016852.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16852 16164 bytes

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